Screaming Frog SEO Spider vs Sitebulb in 2026: Raw crawl depth vs prioritized audit hints
Screaming Frog hands you unlimited raw crawl data for £199 a year and expects you to know what to do with it. Sitebulb wraps the same kind of crawl in 300+ prioritized hints, PDF reports, and JavaScript rendering included from its $18/month entry tier.
Screaming Frog SEO Spider
Sitebulb- Screaming Frog's paid license has no crawl cap; Sitebulb's cheapest tier is capped at 10,000 URLs and Pro at 500,000, only lifting to 10 million on Cloud at $125/month and up.
- Sitebulb includes JavaScript rendering on every plan, including the $18/month Lite tier; Screaming Frog only renders JavaScript on paid licenses, not the free 500-URL tier.
- Screaming Frog includes server log analysis in its standard license at no extra cost; Sitebulb has no log analysis feature at all.
- Sitebulb ships 300+ prioritized SEO Hints with built-in educational context explaining why each issue matters; Screaming Frog surfaces raw crawl data and leaves prioritization to the user.
- Sitebulb has announced an MCP server for AI-assisted audit querying, currently on a waitlist; Screaming Frog has no equivalent AI tool integration in its own feature list.
- Screaming Frog supports custom extraction via XPath, CSS, and regex; Sitebulb's own feature list does not include custom extraction.
- Sitebulb Cloud syncs natively with the desktop client, letting teams trigger cloud crawls from the desktop interface; Screaming Frog has no cloud tier, so team crawling means buying additional per-machine licenses.
Screaming Frog SEO Spider and Sitebulb are the two desktop crawlers technical SEOs actually argue about, and Sitebulb's own FAQ addresses the comparison directly: both are strong crawlers, but Sitebulb differentiates on prioritized Hints, built-in educational context, and visual reporting, while Screaming Frog has a larger raw feature set and stronger filtering for advanced users at the cost of more manual analysis. That framing holds up. Screaming Frog is cheaper at the entry tier, includes server log analysis nobody else in this pair offers, and gives you unlimited crawl volume on a single £199-a-year license. Sitebulb costs more as sites scale but replaces raw data with a ranked, explained audit that a junior analyst or a client can actually use without translation.
The tools at a glance
Screaming Frog SEO Spider
The industry-standard desktop crawler for technical SEO audits.
Screaming Frog hands back exactly what it crawls: status codes, titles, headings, canonicals, redirect chains, structured data, all of it, filterable and exportable, with no layer of interpretation sitting between you and the raw data. The free version stops at 500 URLs; the paid license at £199 a year removes that entirely and adds JavaScript rendering through Chromium.
Server log analysis comes bundled into the same license rather than being sold separately. Upload your Apache, Nginx, or IIS logs and the Spider cross-references Googlebot activity against your crawl, which on a large site is often the single most useful diagnostic available and something several competitors charge extra for or omit entirely.
The trade-off is that Screaming Frog assumes you already know what you are looking for. There is no built-in explanation of why a given issue matters, no prioritized hint ranking, and no client-ready PDF export. It is a tool for someone who wants to build their own analysis on top of clean data, not one that hands you a finished recommendation.
| Feature | Free Free (limited to 500 URLs) | Single License £199/year | 5-9 Licenses £189 per license/year | 10-19 Licenses £179 per license/year | 20+ Licenses £169 per license/year |
|---|---|---|---|---|---|
| URL limit | 500 | Unlimited | Unlimited | Unlimited | Unlimited |
| Server log analysis | No | Yes | Yes | Yes | Yes |
| JavaScript rendering | No | Yes | Yes | Yes | Yes |
| Custom extraction | No | Yes | Yes | Yes | Yes |
Sitebulb
Website crawler for technical SEO audits with prioritized hints and visual reporting
Sitebulb crawls a site the way most crawlers do, then does something most crawlers do not: it ranks every issue it finds by priority across 300-plus Hints, and attaches educational context explaining why each one matters. That framing turns a crawl from a data dump into something closer to a guided audit, which matters a lot for teams onboarding junior staff or presenting findings to a client who does not know what a canonical tag is.
JavaScript rendering is included at no extra cost on every plan, including the $18-a-month Lite tier, which is notable since several competing tools gate JS crawling behind an enterprise upgrade. Pro and Cloud plans add scheduled crawls, side-by-side audit comparisons, and branded PDF reports, while Cloud extends crawl capacity to 10 million URLs with native desktop syncing for teams working across both environments.
The catch shows up at the edges of the pricing ladder. Desktop Pro caps out at 500,000 URLs per audit, and jumping to Cloud for larger sites means a real price jump to $125 a month and up. An announced MCP server for AI-assisted audit querying is still on a waitlist rather than shipped, so it is a roadmap signal more than a current feature.
| Feature | Lite $18/month | Pro $42/month | Cloud From $125/month |
|---|---|---|---|
| URLs per audit | 10,000 | 500,000 | Up to 10 million |
| SEO Hints | 100+ | 300+ | 300+ |
| JavaScript crawling | Yes | Yes | Yes |
| Scheduled audits | No | Yes | Yes |
| Customized PDF reports | No | Yes | Yes |
| Free trial | 14 days | 14 days | 14 days |
Head-to-head feature comparison
| Feature | Screaming Frog SEO Spider | Sitebulb |
|---|---|---|
| Deployment model | Desktop app (Windows, macOS, Linux) | Desktop (Lite/Pro) or Cloud |
| SEO Hints / prioritized recommendations | No, raw data export with no prioritized hint system | Yes, 300+ prioritized Hints with educational context |
| Server log analysis | Yes, included in standard license | Not offered |
| JavaScript rendering | Yes (paid license, via Chromium) | Yes, included on every plan including Lite |
| Custom data extraction (XPath / CSS / regex) | Yes (XPath, CSS, regex) | Not offered |
| Max URLs per crawl or audit | Unlimited on paid license (500 on free tier) | 10,000 (Lite) / 500,000 (Pro) / up to 10 million (Cloud) |
| Scheduled / recurring crawls | No | No (Lite) / Yes (Pro and Cloud) |
| Team collaboration | No native collaboration; per-machine licenses only | No (Lite) / add-on $11 per user (Pro) / included (Cloud) |
| Branded PDF reports | No | No (Lite) / Yes (Pro and Cloud) |
| Looker Studio / Data Studio integration | No | No (Lite/Pro) / Yes (Cloud) |
| AI / MCP querying | No | In development, MCP server on waitlist |
| Free trial | Free version only (no time-limited trial of paid tier) | Yes, 14 days, no card required |
| Starting price | Free / £199/yr | $18/month |
Which should you choose?
SitebulbScreaming Frog SEO SpiderSitebulbScreaming Frog SEO SpiderSitebulbScreaming Frog SEO SpiderSitebulbSitebulb's own comparison of the two tools is honest, and the facts back it up: Screaming Frog wins on raw feature breadth, filtering power, and included log analysis, while Sitebulb wins on turning a crawl into something a less experienced analyst or a client can act on without extra interpretation. Price complicates the picture at scale: Screaming Frog stays at one flat annual fee regardless of site size, while Sitebulb's cost climbs from $18 to $125-plus a month as URL volume grows. Pick based on whether you need raw data you will interpret yourself, or a guided, prioritized output you can hand off as-is.
Bottom line
Buy the Screaming Frog license if you want unlimited crawl volume, included log analysis, and custom extraction for a flat £199 a year, and you are comfortable turning raw data into your own recommendations. Start the Sitebulb trial if you want a crawler that ranks issues by priority, explains them, and produces client-ready PDF reports without extra formatting work, especially if the team includes people newer to technical SEO. For very large sites needing both depth and guided output, running Screaming Frog for log analysis alongside Sitebulb for audit reporting is a reasonable two-tool stack rather than a compromise.
Frequently asked questions
Is Sitebulb better than Screaming Frog for someone new to technical SEO?
Sitebulb is generally the better starting point for someone new to technical SEO, since its 300+ prioritized Hints come with built-in educational context explaining why each issue matters, rather than just a list of flagged URLs. Screaming Frog gives you more raw data but assumes you already know how to interpret it.
Does Sitebulb offer server log analysis like Screaming Frog does?
Sitebulb has no log analysis feature in its published feature list at all. Screaming Frog includes server log analysis in its standard paid license at no extra cost, which is one of its clearest advantages for large sites dealing with crawl budget issues.
How much does it cost to crawl a 2 million URL site with each tool?
Screaming Frog's paid license has no crawl cap, so a single £199-a-year license covers a 2 million URL site the same as a 2,000 URL one. Sitebulb would require the Cloud plan, starting at $125 a month, since Desktop Pro caps out at 500,000 URLs per audit.
What is Sitebulb's MCP server and does Screaming Frog have anything similar?
Sitebulb has announced a Model Context Protocol (MCP) server that will let AI tools query audit data directly, currently open for waitlist signup rather than generally available. Screaming Frog has no equivalent AI querying feature announced in its own feature list.
Can I use Screaming Frog's custom extraction in Sitebulb?
No, custom extraction via XPath, CSS selectors, or regex is a Screaming Frog feature; Sitebulb's published feature list does not include an equivalent capability. If pulling arbitrary custom data points from page source is a requirement, Screaming Frog is the tool that supports it.
Which tool is cheaper for a freelancer with one or two small client sites?
Screaming Frog at £199 a year is cheaper than Sitebulb Pro at $42 a month ($504 a year), and its unlimited crawl cap covers small sites easily. Sitebulb Lite at $18 a month ($216 a year) is competitive on price too, capped at 10,000 URLs, which is enough for most small client sites but worth checking against actual site size first.